scholarly journals Kinetics of the simplest Criegee intermediate reaction with ozone studied using a mid-infrared quantum cascade laser spectrometer

2018 ◽  
Vol 20 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Yuan-Pin Chang ◽  
Hsun-Hui Chang ◽  
Jim Jr-Min Lin
Keyword(s):  
Experimental Study ◽  
Quantum Cascade Laser ◽  
Laboratory Studies ◽  
Laser Spectrometer ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Intermediate Reaction ◽  
Kinetics Of

The first experimental study of Criegee intermediate reactions with ozone, clarifying its role in atmosphere and laboratory studies of ozonolysis.

scholarly journals Theoretical and Experimental Study of Heterodyne Phase-Sensitive Dispersion Spectroscopy with an Injection-Current-Modulated Quantum Cascade Laser

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6176
Author(s):  
Zhen Wang ◽  
Kin-Pang Cheong ◽  
Mingsheng Li ◽  
Qiang Wang ◽  
Wei Ren
Keyword(s):  
Experimental Study ◽  
Analytical Model ◽  
Quantum Cascade Laser ◽  
Near Infrared ◽  
Optical Modulator ◽  
Line Center ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Electro Optical Modulator ◽  
Phase Sensitive

We report the theoretical and experimental study of calibration-free heterodyne phase-sensitive dispersion spectroscopy (HPSDS) in the mid-infrared using a direct current modulated mid-infrared quantum cascade laser (QCL). The modulation of QCL current at several hundred MHz or higher generates the synchronous frequency and intensity modulation of the QCL emission. An analytical model of the phase of the beat note signal in HPSDS is derived by considering the absorption and dispersion processes and incorporating the QCL modulation parameters. In the experiment, a 4.5 μm QCL modulated at 350 MHz was used to measure N2O at 200 Torr in a 10 cm gas cell. The N2O concentrations inferred from the analytical model were compared with the nominal values to show good agreement over the concentration range of 189−805 ppm with a standard deviation <3%. When the QCL wavelength was locked at the line-center of the molecular transition, it was of interest to find that the theoretical model was simplified to that used for near-infrared HPSDS with an electro-optical modulator for laser modulation.

Studies of low-frequency intermolecular hydrogen-bonded vibrations using a continuous supersonic slit jet mid-infrared quantum cascade laser spectrometer

2012 ◽  
Vol 409 ◽  
pp. 1-10 ◽  
Author(s):  
B.A. McElmurry ◽  
L.A. Rivera-Rivera ◽  
K.W. Scott ◽  
Z. Wang ◽  
I.I. Leonov ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Low Frequency ◽  
Laser Spectrometer ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Hydrogen Bonded

Sub-part-per-billion detection of nitric oxide in air using a thermoelectrically cooled mid-infrared quantum cascade laser spectrometer

2002 ◽  
Vol 75 (2-3) ◽  
pp. 343-350 ◽  
Author(s):  
D.D. Nelson ◽  
J.H. Shorter ◽  
J.B. McManus ◽  
M.S. Zahniser
Keyword(s):  
Nitric Oxide ◽  
Quantum Cascade Laser ◽  
Laser Spectrometer ◽  
Mid Infrared ◽  
Quantum Cascade

scholarly journals Mid-infrared quantum cascade laser frequency combs with a microstrip-like line waveguide geometry

2021 ◽  
Vol 118 (7) ◽  
pp. 071101
Author(s):  
Filippos Kapsalidis ◽  
Barbara Schneider ◽  
Matthew Singleton ◽  
Mathieu Bertrand ◽  
Emilio Gini ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Laser Frequency ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Quantum Cascade ◽  
Waveguide Geometry

Direct Determination of Transparency Current in Mid-Infrared Quantum Cascade Laser

2012 ◽  
Author(s):  
D. G. Revin ◽  
R. S. Hassan ◽  
A. B. Krysa ◽  
K. Kennedy ◽  
A. N. Atkins ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Direct Determination ◽  
Mid Infrared ◽  
Quantum Cascade
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